Table 1. Average leaching indices of vitreous slag produced from PHP plasma furnace treatment of cement-solidified waste surrogates

Higher values indicate better chemical durability

Waste surrogate Al Ca Co Cs Fe Si
Boric acid 12.9 12.1 11.6 8.5 17.0 12.8
Sodium sulfate 14.6 12.4 11.5 8.5 16.9 12.2
Spent resin 15.2 13.5 11.5 8.5 16.9 13.6
Powdex resin 14.6 12.9 11.0 8.7 17.7 13.7